Machine for cutting metal bars.



- H. JENSEN.

MAGHINE FOR CUTTING METAL BARS.

APPLICATION FILED MAR.23, 1909.

Patented June-21,1910.

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1 yg/V 7WR, V kW e/M 5 I H. H. JENSEN. MACHINE FOR CUTTING METAL BARS.

AIPLIUATION FILED 101113.22, 1909.

96%085a Patented 31111921, 1910.

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FFTQ.

HANS I-I. JENSEN, OF MILWAUKEE, WISCONSIN.

MACHINE FOR CUTTING METAL BARS.

To all whom it may concern:

Be it known that I, HANS H. JENSEN, residing in Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented new and usefulImprovements in Machines for Cutting Metal Bars, of which the followingis a description, reference being had to the accompanying drawings,which are a part of this specification.

My invention has relation to improvements in machines for cutting metalbars.

The invention relates particularly to the mechanism for reciprocatingthe movable knife-carrying block, said mechanism being of simplecharacter, and of such construction as to be readily operated, andprovide for a most effective cutting of the metal bars.

l/Vith the above primary object, and other incidental objects, in view,the invention consists of the devices and parts, or the equivalentsthereof, as hereinafter more fully set forth.

In the accompanying drawing, Figure 1 is a side elevation of the device,parts broken away, and showing the bar to be cut in cross section; Fig.2 is a plan view; Fig. 3 is a vertical sectional view on the line 3-3 ofFig. 1; and Fig. l is an elevation of that side of the machine oppositeto the side shown in Fig. l, and with the major portion of the standardwhich is on this side of the machine broken away, and a part of the camring also broken away, the bar to be out being shown in section.

Referring to the drawings, the numeral 7 indicates the base of the frameof the mechanism, said base provided with upwardly ex tending standards8, 8 which are spaced a desired distance apart by means of spacing lugs9, 9, bolts (see Fig. 3) being preferably passed through the standardsand through said lugs.

Through the lower ends of the standards are alined openings 10, 10.Bolted, or otherwise suitably secured, to the inside of one of thestandards and having its upper cutting edge extending slightly above thelower bordering edge of the opening 10 of said standard is a stationaryknife jaw 11. Above this stationary knife jaw, and adapted to bereciprocated between the opposed inner faces of the two standards, is aknifecarrying block 12. A knife jaw 13 is set into a recess 14; in oneface of this block and secured in place therein by any desired means,as, for instance, by a screw 15. The

Specification of Letters Patent.

Application filed March 22, 1909.

Patented June 21, 1910.

Serial No. 484,855.

lower cutting edge of this knife projects downwardly slightly below thelower edge of the block.

I prefer to employ the specific means illustrated in the drawings forreciprocating the block 12, a description of which will now be given.The upper ends of the two standards are provided with alined openings16, 16 which form bearings for a shaft 17. On the outer end of thisshaft is a suitable handle for operating the shaft, preferably in theform of a socketed disk-like device 18 keyed to the shaft, and havinghandles or arms 19 inserted in the sockets and radiat ing therefrom.

Mounted on the shaft, and disposed loosely between the two opposed innerfaces of the standards, is an eccentrically operating mechanism forimparting to the block 12 its up and down reciprocating movement. Thismechanism consists of an eccentric cam 20 rigidly mounted on the shaft17 by means of a key, or otherwise, and a ring 21 surrounding the cam.The cam is preferably provided with an enlarged central portion or hubwhich forms two shoulders 22, 22, said shoulders contacting with theinner faces of the standards 8, and thereby increasing the bearingsurfaces. One edge of the ring 21 is provided with an inwardly extendingrim or annulus 28, while against the opposite edge of the ring isadjusted another rim or annulus 24, which is separate from the ring.Disposed in the space between the periphery of the cam 20 and the innerside of the ring 21, and of a length to extend from one annulus (23) tothe other (2a), are a series of elongated anti-friction rollers 25.

The lower portion of the ring is provided centrally with a dependingrounded lug 26 which fits in a correspondingly shaped recess 27 providedin the upper edge of the knife block. The engagement of this lug withthe recess forms a pivotal connection between the ring and the block. Itwill be obvious that when the shaft 17 is turned in either direction byoperating the wheel or disk 18 on the outer end of said shaft, the cam20 will be caused to rotate within the ring 21. As the portion of thecam which is the greatest distance from the shaft is carried aroundtoward and to a lower position, the ring 21 is necessarily lowered, and

consequently the knife block 12 carried by.

said ring. As the cam, with the continued rotation of the shaft, travelstoward and to the higher position, the ring 21 and block 12 arenecessarily raised. In this manner, the knife block with its knife 13 isreciprocated up and down.

In the operation of the invention a bar 28 of metal is passed throughthe alined openings 10,10 of the standards, as shown clearly in Figs. 3and 4:. The wheel 18 is now turned by the operator grasping and applyingforce to the handles or arms 19, and in this manner the shaft 17 isrotated. The rotation of the shaft causes a reciprocation of-the knifeblock 12 in the manner hereinbefore fully pointed out. On the downmovement of the knife block, the knife 13 carried thereby is broughtinto engagement with the bar 28, and forced therethrough, the lowerstationary knife 11, of course, cooperating in the cutting.

What I claim as my invention is:

A machine for cutting metal bars, comprising a frame having upwardlyextending standards spaced apart and provided with alined openings andwith a knife recess, spacing and guide lugs positioned between the twostandards, a stationary knife positioned in the recess and fastened toone of the standards and having its upper cutting edge extendingslightly above the lower edge of the opening, a reciprocating blockcarrying a knife and positioned between the standards and the guide lugsand guided thereby, said block provided with an upper circular recessextending through the block, a shaft extending through and havingbearings in both standards and provided with an eccentric positionedbetween the standards and rigidly fastened to said shaft, a ringsurrounding said eccentric and having a depending rounded lug shaped toclosely and i pivotally fit within the circular recess of the block andto support and reciprocate said block, and a disk-like member fastenedto the shaft and having an operating handle extending therefrom.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

HANS H. JENSEN. Vitnesses ANNA F. SGHMIDTBAUER, ALMA A. KLUG.

